Knob attachment.



PATENTED FEB. 5, 1907.

M. WEBER. KNOB ATTACHMENT. APPLIOATION FILED NOV. 2a. 1905.

' Wan wane? 5 MARTIN WEBER, OF DENVER, COLORADO.

- KNOB ATTACHMENT.

Specification of Letters Patent.

Patented Feb. 5, 1907;

Application filed November 29, 1905. Serial No. 289,614. I

To a, whom it may concern.-

Be it known that I, MARTIN WEBER, a citizen of'the United States,residing at Denver, in the county of Denver and State of Colorado, haveinvented certain new and useful Im rovements in Knob Attachments and Ido eclare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to im rovements in devices for attaching door-kno sto the spindles of looks. I I

The object of the invention is to provide a simple, inexpensive,durable, and eflicient attaching device of this character by means ofwhich the knob may be quickly applied to and adjusted upon the s' indleand as quickly and easily removed t erefrom.

With the above and other objects in view the inventionconsists ofcertain novel features of construction, combination, and arrangement ofparts, as will be hereinafter described and claimed.

, Inthe accompanying drawings, Figure 1 is a side elevation of alock-spindle with two knobs secured upon its ends in accordance with myinvention; Fig. 2, partly an elevation and partly a longitudinalsectional view of the same. Fig 3 is a transverse sectional view, andFig 4 is a perspective view of one of the hubs or shanks of thedoor-knobs.

Referring to the drawingsby numeral, 1 denotes the usual rectangularspindle of a lock which has door-knobs 2 3 secured upon its posite ends.Whilethese knobs may be oi .any desired form and construction, Ipreferably construct them of a body or handgrip 4 and a hub or shank 5,which plarts are united by soft metal, cement, or ot er suitablematerial 6. The hubs or shanks 5 are tubular in form and'haverectangular bores to receive the ends of the spindle. The shank of theknob 2 is rigidly secured to the spindle 1 by a crossin, rivet, or thelike 7, while the shank of t e knob 3 isadjustably and detachablymounted, as presently explained.

Each of the shanks 5 is. formed adjacent to its end with anannular-collar 8, which is adapted to engage the inner face of the bodyor handip 4 of the knob, as shown. The

inner en 9 of the shank is adapted to pro-' ject into an undercut recessor cavity 10 in the body 4 and is formed with an annu ar series ofdepressions or recesses 11, which are adapted to receive thebindingmaterial 6, so that the handle or body 4 will be prevented from pullingofl of the shank and spindle:

The knob 3 is detachably and ad 'ustably secured upon the spindle bymeans 0 a pawland-ratchet connection, the pawl being carried by theshank of the knob and the rack by the spindle. This rack 12 is formedupon one face of the spindle 1, adjacent to its beveled end 13, and thepawl 14 is in the form of a straight strip of spring metal, having oneof its ends 15 bent at right angles to engage the teeth of the ratchetl2. This spring 14 is disposed in a longitudinally-extending seat orrecess 16, formed in the outer face of the shank 5 of the knob 3 andextending through and beneath the collar or flange 8, as shown. At theouter end of the recess 16 is formed a transverse opening 17, throughwhich the end 15 of the spring projects, so that it may engage the teethof the ratchet 12. The spring is secured in the seat or recess 16 bywedging its inner end under the collar 8 and also, if desired, bydriving a small wedge 18 between its upper face and the recess oropening in theco lar, as clearly shown in the drawings. It will be seenthat when the spindle is inserted in the shank 5 of the knob 3 the end15 of the spring-pawl 14 will be successively engaged with the teeth ofthe ratchet 12, so that the knob 3 will be prevented from sli pingofl".' To permit the knob to be readi y removed, I form to one side ofthe recess or seat '16 a notch 19, in which a nail or pointed instrumentmay be inserted to raise the spring-pawl 14 sufficiently to disengageits end 15 from the teeth of the ratchet.

The construction, operation, and advantagesof the invention will bereadily understood from the fore oing description, taken in connectionwith t e accompanying drawings. It will be seen that when one of theknobs is detachably and adjlustably secured upon the spindle, as setfort the partsmay be quickly adjusted upon a door of any thickness andsecurely locked thereon, so

that it will be impossible for the knobs to become detached withoutfirst manually liftin the spring-pawl14.

arious changes in the form, proportion,

and the minor details of construction may be.

resorted to without departing from the principle or sacrificing any ofthe advantages of the invention.

IIO

. Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is i In combination with a spindle havingratchet-teeth on one of its faces, a knob having a recess and a shankhaving oneend in said recess, said shank being provided with a bore toreceive the spindle, and an annular collar bearin against one side ofthe knob and provided with an inwardly-widened, wedge-shaped open ng,said shank being provided with a transverse opening which we tends tothe ratchet-face of the spindle and with a longitudinal opening whichextends from said transverse opening to the Wedgeshaped opening in thecollar a spr ng-pawl 1 comprising a straight arm in sai' longitudinalopening of the shank and opening of the collar, and a transverse arm inthe transveise' opening of the shank and engaging 2 the ratchet-teeth ofthe spindle, a wedge 1n the opening of the collar and securing the endof the longer arm of the spring-pawl therein, the broadened end of saidwedge extending into the recess in the knob, and a 2 my hand in presenceof two subscribing Wit- 3 MARTIN WEBER.

Witnesses:

JOHN. G. HoLzwARTn, LUDOLF P. BI'scHoFF.

